CVE-2026-43501

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: ipv6: rpl: reserve mac_len headroom when recompressed SRH grows ipv6_rpl_srh_rcv() decompresses an RFC 6554 Source Routing Header, swaps the next segment into ipv6_hdr->daddr, recompresses, then pulls the old header and pushes the new one plus the IPv6 header back. The recompressed header can be larger than the received one when the swap reduces the common-prefix length the segments share with daddr (CmprI=0, CmprE>0, seg[0][0] != daddr[0] gives the maximum +8 bytes). pskb_expand_head() was gated on segments_left == 0, so o...

Affected product and versions

Product

Linux Linux, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support

Affected versions

>= 8610c7c6e3bd647ff98d21c8bc0580e77bc2f8b3 < bde199c72d319a4e207f88daabc888317504e2fb, >= 8610c7c6e3bd647ff98d21c8bc0580e77bc2f8b3 < be1fa0aa9b4fdd5a8b7a61ba520a690a68391e6e, >= 8610c7c6e3bd647ff98d21c8bc0580e77bc2f8b3 < 0a9e8053f1f8a8e1bfc1dd61ffe67be6c1180402, >= 8610c7c6e3bd647ff98d21c8bc0580e77bc2f8b3 < 8e8be63465a5e80394c70324603dfea1bfdad48f, >= 8610c7c6e3bd647ff98d21c8bc0580e77bc2f8b3 < 4babc2d9fda2df43823b85d08a0180b68f1b0854, >= 8610c7c6e3bd647ff98d21c8bc0580e77bc2f8b3 < c261d07a80576dc8ccf394ef8f074f8c67a06b37, >= 8610c7c6e3bd647ff98d21c8bc0580e77bc2f8b3 < 7398ebefbfd4f8a31d4f665a4213302fa995494b, >= 8610c7c6e3bd647ff98d21c8bc0580e77bc2f8b3 < 9e6bf146b55999a095bb14f73a843942456d1adc, >= 5.7, >= 5.7 < 5.10.258, >= 5.11 < 5.15.209, >= 5.16 < 6.1.175, >= 6.2 < 6.6.140, >= 6.7 < 6.12.86, >= 6.13 < 6.18.27, >= 6.19 < 7.0.4, 7.1

Fixed versions

5.10.258, 5.15.209, 6.1.175, 6.6.140, 6.12.86, 6.18.27, 7.0.4

Technical data

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE

CWE-131, CWE-787